Yazar "Acet, M." için listeleme
-
Ab initio Prediction of Martensitic and Intermartensitic Phase Boundaries in Ni-Mn-Ga
Dutta, B.; Çakır, Aslı; Giacobbe, C.; Al-Zubi, A.; Hickel, T.; Acet, M.; Neugebauer, J. (Amer Physical Soc, 2016)Despite the importance of martensitic transformations of Ni-Mn-Ga Heusler alloys for their magneto-caloric and shape-memory properties, the martensitic part of their phase diagrams is not well determined. Using an ab initio ... -
Annealing-time and annealing-temperature dependencies of the size of Ni-Mn-In shell-ferromagnetic nano-precipitates by Scherrer analysis
Dincklage, L.; Scheibel, F.; Çakır, Aslı; Farle, M.; Acet, M. (Amer Inst Physics, 2018)Shell-ferromagnetic effects are observed in Ni-Mn-based off-stoichiometric Heuslers decomposed into ferromagnetic precipitates embedded in an antiferromagnetic matrix when the surface-to-volume ratio of the precipitates ... -
Characteristics of 5M modulated martensite in Ni-Mn-Ga magnetic shape memory alloys
Çakır, Aslı; Acet, M.; Righi, L.; Albertini, F.; Farle, M. (Amer Inst Physics, 2015)The applicability of the magnetic shape memory effect in Ni-Mn-based martensitic Heusler alloys is closely related to the nature of the crystallographically modulated martensite phase in these materials. We study the ... -
Effect of high temperature sintering on the structural and the magnetic properties of La1.4Ca1.6Mn2O7
Tasarkuyu, E.; Coskun, A.; Irmak, A. E.; Akturk, S.; Unlu, G.; Samancioglu, Y.; Acet, M. (Elsevier Science Sa, 2011)We investigate the effect of sintering temperature on the structural and magnetic properties of La1.4Ca1.6Mn2O7 double perovskite manganite compound prepared by the sol-gel route. Three sintering temperatures (1273, 1473 ... -
Electronic aspects of the martensitic transition in Ni-Mn based Heusler alloys
Krenke, T.; Moya, X.; Aksoy, S.; Acet, M.; Entel, P.; Manosa, Ll.; Wassermann, E. F.; Yücel, Atila (Elsevier, 2007)The martensitic transformation temperature Ms depends linearly on the valence electron concentration for Ni-Mn-X Heusler systems where X is a group III-group V element. However, the slopes of the linearity are different ... -
Exchange bias caused by field-induced spin reconfiguration in Ni-Mn-Sn
Çakır, Aslı; Acet, M.; Farle, M. (Amer Physical Soc, 2016)Exchange bias is observed in ferromagnetic/antiferromagnetic (FM/AF) layered stacks and in materials with neighboring ferromagnetic and antiferromagnetic granules. The latter is commonly observed in Ni-Mn-based martensitic ... -
Intermartensitic transitions and phase stability in Ni50Mn50-xSnx Heusler alloys
Çakir, A.; Righi, L.; Albertini, F.; Acet, M.; Farle, M. (Elsevier Ltd, 2015)Ni-Mn based Heusler alloys are of considerable interest due to their multifunctional properties such as magnetic shape memory, magnetocaloric effect and spintronics. The reason for these multifunctional properties is the ... -
Magnetic and electrical transport properties of La0.65Ca0.30Pb0.05Mn0.90Cu0.10O3 compounds: Thermal hysteresis
Irmak, A. E.; Tasarkuyu, E.; Coskun, A.; Acet, M.; Samancioglu, Y.; Akturk, S. (Elsevier, 2015)Structural, electrical, and magnetic properties of La-0.65(Ca0.30Pb0.05)Mn0.90Cu0.10O3 compound were investigated. The compound, prepared by the sol-gel route, was pressed into pellets and one of them was sintered at 900 ... -
Magnetic properties of La0.65Ca0.30Pb0.05Mn0.9B0.1O3 (B = Co, Ni, Cu and Zn)
Coşkun, Atilla; Taşarkuyu, Ergün; Irmak, A. E.; Acet, M.; Samancıoğlu, Y.; Aktürk, S. (Elsevier Science Sa, 2015)The La0.65Ca0.30Pb0.05Mn0.9B0.1O3 (A = Co, Ni, Cu and Zn) manganites have been prepared via sol-gel method and sintered at 1100 degrees C for 24 h. The aim of the study was to investigate B-site cation doping effects on ... -
Non-volatile high-temperature shell-magnetic pinning of Ni-Mn-Sn Heusler precipitates obtained by decomposition under magnetic field
Çakır, Aslı; Acet, M. (Elsevier Science Bv, 2018)The thermodynamic instability of the off-stoichiometric Ni49.8Mn45.1Sn5.1 martensitic Heusler causes it to decompose into ferromagnetic Ni50Mn25Sn25 precipitates and an antiferromagnetic NiMn matrix. If the decomposition ... -
Phase formation characteristics and magnetic properties of bulk Ni2MnGe Heusler alloy
Adem, U.; Dincer, I.; Aktürk, Selçuk; Acet, M.; Elerman, Y. (Elsevier Science Sa, 2015)We have systemically studied the effects of annealing temperature and alloy composition on the structural and magnetic properties of bulk Ni2MnGe and Ni2.1Mn0.9Ge Heusler alloys. We have observed that both annealing ... -
Probing glassiness in Heuslers via density functional theory calculations
Entel, P.; Gruner, M.E.; Acet, M.; Hucht, A.; Çakır, A.; Arróyave, R.; Ren, X. (Springer Verlag, 2018)Heusler compounds and alloys form a unique class of intermetallic systems with functional properties interfering with basic questions of fundamental aspects of materials science. Among the functional properties, the magnetic ... -
Probing Structural and Magnetic Instabilities and Hysteresis in Heuslers by Density Functional Theory Calculations
Entel, P.; Gruner, M.E.; Fähler, S.; Acet, M.; Çahır, A.; Arróyave, R.; Sokolovskiy, V.V. (Wiley-VCH Verlag, 2018)Martensitic transformations of rapidly quenched and less rapidly cooled Heusler alloys of type Ni–Mn–X with X = Ga, In, and Sn are investigated by ab initio calculatioms. For the rapidly cooled alloys, we obtain the ... -
Room-temperature five-tesla coercivity of a rare-earth-free shell-ferromagnet
Scheibel, F.; Spoddig, D.; Meckenstock, R.; Gottschall, T.; Çakır, Aslı; Krenke, T.; Acet, M. (American Institute of Physics Inc., 2017)Ni2MnX-based Heusler (X: main group element), when enriched with Mn, will decompose into ferromagnetic Ni2MnX and antiferromagnetic NiMn when temper-annealed around 650 K. When the starting material is chosen such that the ... -
Segregation tendency of Hensler alloys
Sokolovskiy, V. V.; Gruner, M. E.; Entel, P.; Acet, M.; Çakır, Aslı; Baigutlin, D. R.; Buchelnikov, D. (Amer Physical Soc, 2019)Segregation in a series of Ni2Mn1+x(In, Sn, Ga, Al)(1-x) and Mn2Ni1+x(Ga, Al) as well as Ni2+xMn1-xGa Heusler alloys is studied by first-principles calculations. We show that Mn-rich Ni2Mn1+x(In, Sn, Al)(1-x) compounds are ... -
Shell-ferromagnetic precipitation in martensitic off-stoichiometric Ni-Mn-In Heusler alloys produced by temper-annealing under magnetic field
Çakır, A.; Acet, M.; Wiedwald, U.; Krenke, T.; Farle, M. (Elsevier Ltd, 2017)The variety of the multifunctional properties of martensitic Ni-Mn based Heusler alloys are related to the presence of a magnetostructural transition. We report here on a new functionality based on a newly observed property. ... -
Shell-ferromagnetism of nano-Heuslers generated by segregation under magnetic field
Çakır, Aslı; Acet, M.; Farle, M. (Nature Publishing Group, 2016)We report on a new functional property in an AF martensitic Heusler Ni50Mn45In5, which when annealed at high temperatures under a magnetic field, segregates and forms Ni50Mn25In25 Heusler precipitates embedded in a Ni50Mn50 ...
